公开(公告)号：US3786270A

公开(公告)日：1974-01-15

申请号：US3786270D

申请日：1973-02-01

Applicant: ATOMIC ENERGY COMMISSION

Inventor： BORKOWSKI C ,  KOPP M

IPC: H01J47/06 ,  G01T1/18

CPC classification number: H01J47/06

Abstract: A gas-filled proportional counter camera that images photon emitting sources has been provided. A two-dimensional, positionsensitive proportional multiwire counter is provided as the detector. The counter consists of a high voltage anode screen sandwiched between orthogonally disposed planar arrays of multiple parallel strung, resistively coupled cathode wires. Two terminals from each of the cathode arrays are connected to separate timing circuitry to obtain separate X and Y coordinate signal values from pulse shape measurements to define the position of an event within the counter arrays which may be recorded by various means for data display. The counter is further provided with a linear drift field which effectively enlarges the active gas volume of the counter and constrains the recoil electrons produced from ionizing radiation entering the counter to drift perpendicularly toward the planar detection arrays. A collimator is interposed between a subject to be imaged and the counter to transmit only the radiation from the subject which has a perpendicular trajectory with respect to the planar cathode arrays of the detector.

Abstract translation: 已经提供了一种充满气体的比例计数器相机，用于对光子发射源进行成像。 提供二维，位置敏感的比例多线计数器作为检测器。 该计数器由夹在正交布置的多个并联串联电阻耦合的阴极线的平面阵列之间的高压阳极屏幕组成。 来自每个阴极阵列的两个端子连接到单独的定时电路，以从脉冲形状测量获得单独的X和Y坐标信号值，以定义可以通过用于数据显示的各种装置记录的计数器阵列内的事件的位置。 该计数器还设置有线性漂移场，其有效地扩大了计数器的活性气体体积，并限制了从电离辐射进入计数器产生的反冲电子垂直于平面检测阵列漂移。 将待成像的被摄体与计数器之间插入准直仪，以仅发射来自被检体的辐射，其具有相对于检测器的平面阴极阵列的垂直轨迹。